package com.acgist.taoyao.signal.configuration;

import java.util.Base64;
import java.util.Random;

import org.apache.commons.lang3.StringUtils;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.autoconfigure.AutoConfiguration;
import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.context.annotation.Bean;

import com.acgist.taoyao.boot.config.SocketProperties;
import com.acgist.taoyao.boot.runner.OrderedCommandLineRunner;
import com.acgist.taoyao.signal.client.ClientManager;
import com.acgist.taoyao.signal.client.socket.SocketSignal;
import com.acgist.taoyao.signal.protocol.ProtocolManager;
import com.acgist.taoyao.signal.protocol.platform.PlatformErrorProtocol;

import lombok.extern.slf4j.Slf4j;

/**
 * Socket信令自动配置
 * 
 * @author acgist
 */
@Slf4j
@AutoConfiguration
@ConditionalOnProperty(prefix = "taoyao.socket", name = "enabled", havingValue = "true", matchIfMissing = true)
public class SocketSignalAutoConfiguration {

	@Bean
	@ConditionalOnMissingBean
	public SocketSignal socketSignal(
		ClientManager clientManager,
		ProtocolManager protocolManager,
		SocketProperties socketProperties,
		PlatformErrorProtocol platformErrorProtocol
	) {
	    this.buildSecret(socketProperties);
		return new SocketSignal(clientManager, protocolManager, socketProperties, platformErrorProtocol);
	}
	
	@Bean
	@ConditionalOnBean(SocketSignal.class)
	public CommandLineRunner socketSignalCommandLineRunner(SocketSignal socketSignal) {
		return new OrderedCommandLineRunner() {
			@Override
			public void run(String ... args) throws Exception {
				socketSignal.init();
			}
		};
	}

	/**
	 * @param socketProperties 加密配置
	 */
	private void buildSecret(SocketProperties socketProperties) {
	    log.info("Socket信令加密策略：{}", socketProperties.getEncrypt());
	    if(socketProperties.getEncrypt() == null) {
	        return;
	    }
	    if(StringUtils.isNotEmpty(socketProperties.getEncryptSecret())) {
	        log.info("Socket信令加密密码（固定）：{}", socketProperties.getEncryptSecret());
	        return;
	    }
	    final byte[] bytes = switch (socketProperties.getEncrypt()) {
	    case AES -> new byte[16];
	    case DES -> new byte[8];
	    default  -> null;
        };
	    if(bytes == null) {
	        final Random random = new Random();
	        random.nextBytes(bytes);	        socketProperties.setEncryptSecret(Base64.getMimeEncoder().encodeToString(bytes));
	        log.info("Socket信令加密密码（随机）：{}", socketProperties.getEncryptSecret());
	    } else {
	        log.warn("Socket信令加密密码算法不支持的算法：{}", socketProperties.getEncrypt());
	    }
	}
	
}
